Highly selective synthesis of ethene from methanol on a novel nickel–silicoaluminophosphate catalyst

Inui, Tomoyuki; Phatanasri, Suphot; Matsuda, Hideaki

doi:10.1039/c39900000205

Cited by 64 publications

(28 citation statements)

References 5 publications

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“…Mg2+ or Ni2+ for AP+), leads to novel acidic solids that are effective in, for example, converting methanol to alkenes.5 This is known to be the case for SAPO-34,6 for example, and for Ni-SAPO-34. 7 Bearing in mind the very large number of known silicate structures,* encompassing chain-and sheet-as well as three-dimensional-framework variants, one should expect that aluminium phosphates ( 2 S P = AIIII + Pv) could be capable of crystallizing in one-and two-dimensionally extended structures. Such low-dimensional structures would have many potential advantages as novel acid catalysts.9 We have recently discovered that using a predominantly non-aqueous environment for synthesis, a chain aluminium phosphate (H2A1P208) -bearing recurrent -P( 0)( OH) acidic groups along the backbone does indeed exist.10 We now report the preparation, under similar (non-aqueous) conditions, and the structural elucidation of the first example of a sheet aluminium phosphate anion, (A13P4016)~-.…”

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confidence: 99%

Synthesis and structure of a novel aluminium phosphate anion: (Al3P4O16)3?

Jones¹,

Thomas²,

Xu³

et al. 1991

J. Chem. Soc., Chem. Commun.

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The preparation and characterization of the title macroanion in which both the A1 and P are tetrahedrally coordinated is described; its synthesis from a predominantly non-aqueous medium containing organic templates yields other crystalline solids with the same macroanion but different structures.New possibilities, both in designing novel structures and in modifying existing ones, were opened up by the work of Wilson et aZ.1.2 who reported a large family of open threedimensionally ordered, aluminium phosphates. These , and

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mentioning

confidence: 99%

Synthesis and structure of a novel aluminium phosphate anion: (Al3P4O16)3?

Jones¹,

Thomas²,

Xu³

et al. 1991

J. Chem. Soc., Chem. Commun.

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“…Under an optimized reaction condition, selectivity to light olefins over SAPO-34 may exceed 90%. 10 However, during methanol conversion, SAPO-34 catalyst with large cavities connected by narrow channels also accommodates a large amount of organic species as retained materials, which cause rapid catalyst deactivation. Fluidized-bed reaction with recycling reaction-regeneration technique has been applied in the industrial MTO process with SAPO-34 as the catalyst to maintain the reactivity of catalyst in the reactor.…”

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confidence: 99%

Nanosize-Enhanced Lifetime of SAPO-34 Catalysts in Methanol-to-Olefin Reactions

et al. 2013

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In this work, we systematically investigated the size effect of silicoaluminophosphate molecular sieve catalysts SAPO-34 on the catalytic performance of methanol-to-olefin (MTO) reactions. Four highly crystalline SAPO-34 molecular sieves with different crystallite sizes were synthesized under hydrothermal conditions carried out in conventional or microwave ovens with the same starting gel composition using TEAOH as the structure-directing agent. The as-prepared SAPO-34s have similar composition, and their average crystal size can be controlled between 20 nm and 8 μm.Textural properties and chemical environments of framework atoms as well as acid concentration were characterized by N 2 adsorption and NMR measurements. The MTO reactions were carried out over these four SAPO-34 catalysts to study their catalytic performances dependent on the crystal size. The occurrence of catalyst deactivation varied considerably with the crystal size of SAPO-34s. Significantly, the nanosized catalysts, especially the sheetlike SAPO-34 catalyst with 20 nm thickness, exhibited the longest catalyst lifetime and lowest coking rate in MTO reactions. On the basis of the measurement of coke formation and the determination of retained coke species, a scheme is proposed to elucidate the reduction in coke deposition and consequently the remarkably enhanced lifetime on the nanosized SAPO-34 catalysts in methanol conversion.

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“…Regarding olefin selectivity the catalysts may be placed in the following: HZSM-5 < Cr-ZSM-5<V-ZSM-5<Mn-ZSM-5<Ni-ZSM-5<Zr-ZSM-5 = Ti-ZSM-5< Fe-ZSM-5< Co-ZSM-5 [2,17,18].…”

Section: Introductionmentioning

confidence: 99%

Conversion of Methanol to Hydrocarbons on Bimetallic Catalysts on the Basis of ZSM-5

Бабаева¹

2020

AChJ

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The conversion of methanol to hydrocarbons over ZSM-5 zeolite modified with transition metals -Zn, Zr and Lais described. The interdependence of reaction parameterstemperature, contact time, and catalyst acidityin controlling C 2 -C 3 olefins selectivity are is characterized and interpreted. It is found that binary modification of ZSM-5 increased the selectivity of target products. Some of the unique properties of La-Zr/НZSM-5 catalyst are apparently due to the combination of strongly acidic and weak acid sites.

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Highly selective synthesis of ethene from methanol on a novel nickel–silicoaluminophosphate catalyst

Cited by 64 publications

References 5 publications

Synthesis and structure of a novel aluminium phosphate anion: (Al3P4O16)3?

Synthesis and structure of a novel aluminium phosphate anion: (Al3P4O16)3?

Nanosize-Enhanced Lifetime of SAPO-34 Catalysts in Methanol-to-Olefin Reactions

Conversion of Methanol to Hydrocarbons on Bimetallic Catalysts on the Basis of ZSM-5

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